Yes.
Just did it today. And it was with my old log in (I've used this trick for other times I've needed a channel.for a game) and still let.me.have five days for free.
I did it through the app and will just Chromecast to my tv....and as I'm sipping my victory drink I'll cancel after the game!
I signed up for the 5 day trial and was able to add the sports pack for the LHN.